import gnu.io.*; import java.util.*; import java.io.*; public class CommTest {     static CommPortIdentifier portId;     static Enumeration portList;     static int bauds[] = { 9600, 19200, 57600, 115200 };    //检测端口所支持的波特率     public static void main(String[] args)     {         portList = CommPortIdentifier.getPortIdentifiers();         System.out.println("短信设备端口连接测试...");         while (portList.hasMoreElements())         {             portId = (CommPortIdentifier) portList.nextElement();             if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL)             {                 System.out.println("找到串口: " + portId.getName());                 for (int i = 0; i < bauds.length; i++)                 {                     System.out.print("  Trying at " + bauds[i] + "...");                     try                     {                         SerialPort serialPort;                         InputStream inStream;                         OutputStream outStream;                         int c;                         String response;                         serialPort = (SerialPort) portId.open("SMSLibCommTester", 1971);                         serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_IN);                         serialPort.setSerialPortParams(bauds[i], SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);                         inStream = serialPort.getInputStream();                         outStream = serialPort.getOutputStream();                         serialPort.enableReceiveTimeout(1000);                         c = inStream.read();                         while (c != -1)                             c = inStream.read();                         outStream.write('A');                         outStream.write('T');                         outStream.write('\r');                         try                         {                             Thread.sleep(1000);                         }                         catch (Exception e)                         {                         }                         response = "";                         c = inStream.read();                         while (c != -1)                         {                             response += (char) c;                             c = inStream.read();                         }                         if (response.indexOf("OK") >= 0)                         {                             try                             {                                 System.out.print("  获取设备信息...");                                 outStream.write('A');                                 outStream.write('T');                                 outStream.write('+');                                 outStream.write('C');                                 outStream.write('G');                                 outStream.write('M');                                 outStream.write('M');                                 outStream.write('\r');                                 response = "";                                 c = inStream.read();                                 while (c != -1)                                 {                                     response += (char) c;                                     c = inStream.read();                                 }                                 System.out.println("  发现设备: " + response.replaceAll("\\s+OK\\s+", "").replaceAll("\n", "").replaceAll("\r", ""));                             }                             catch (Exception e)                             {                                 System.out.println("  没有发现设备!");                             }                         }                         else System.out.println("  没有发现设备!");                         serialPort.close();                     }                     catch (Exception e)                     {                         System.out.println("  没有发现设备!");                     }                 }             }         }     } }